QT/E 中文显示 及打开图像 源代码

/* *show pictrue main cpp */ #include "frmMain.h" #include <qaccel.h> #include <qtextview.h> #include <qcstring.h> #include <qmenubar.h> #include <qfiledialog.h> #include <qmessagebox.h> #include <qpushbutton.h> #include <qlabel.h> #include <qpopupmenu.h> #include <qkeycode.h> #include <qclipboard.h> #include <qpainter.h> #include <qapplication.h>//for qApp //frmM::frmM( QWidget *parent, const char *name, bool modal, WFlags f ) frmM::frmM( QWidget *parent, const char *name, WFlags f ) : frmMain( parent, name, f ), //conversion_flags( PreferDither ), //filename( 0 ), helpmsg( 0 ) //初始化帮助对话框,否则出现断错误 { conversion_flags=0; menubar = new QMenuBar(this); menubar->setSeparator( QMenuBar::InWindowsStyle ); QStrList fmt = QImage::outputFormats();//可保存的图片格式 saveimage = new QPopupMenu(); for (const char* f = fmt.first(); f; f = fmt.next()) { saveimage->insertItem( f );//插入保存的图片格式 } connect( saveimage, SIGNAL(activated(int)), this, SLOT(saveImage(int)) ); //文件菜单 file = new QPopupMenu(); menubar->insertItem( tr("文件"), file ,Key_F2); file->insertItem( tr("新建"), this, SLOT(newWindow()), CTRL+Key_N ); file->insertItem( tr("打开"), this, SLOT(openFile()), CTRL+Key_O ); si = file->insertItem( tr("保存图片"), saveimage );//插入带子项的保存菜单 file->insertSeparator();//插入横杠 file->insertItem( tr("退出"), qApp, SLOT(quit()), Key_Escape ); //帮助菜单 QPopupMenu* help = new QPopupMenu(); menubar->insertItem( tr("帮助"), help ); help->insertItem( tr("关于??"), this, SLOT(giveHelp()), Key_F1 ); PixmapLabel1 = new QLabel( fmShowPic, "PixmapLabel1" ); PixmapLabel1->setGeometry( QRect( 0, 0, 510, 430 ) ); //PixmapLabel1->setPixmap( image0 ); PixmapLabel1->setScaledContents( TRUE ); connect(btnOpenPic,SIGNAL(clicked()),this,SLOT(openFile())); QAccel *accel = new QAccel( this ); accel->connectItem( accel->insertItem( Key_F1 ),this, SLOT(showKeyf1()) ); accel->connectItem( accel->insertItem( Key_F2 ),this, SLOT(showKeyf2()) ); accel->connectItem( accel->insertItem( Key_F3 ),this, SLOT(showKeyf3()) ); accel->connectItem( accel->insertItem( Key_F4 ),this, SLOT(showKeyf4()) ); } frmM::~frmM(){ } void frmM::showKeyf1() { txtVShowKey->setText( tr( "显示按键 F1 " ) ); } void frmM::showKeyf2() { txtVShowKey->setText( tr( "显示按键 F2 " ) ); } void frmM::showKeyf3() { txtVShowKey->setText( tr( "显示按键 F3 " ) ); } void frmM::showKeyf4() { txtVShowKey->setText( tr( "显示按键 F4 " ) ); } void frmM::newWindow() { frmM* that = new frmM(0, tr("新画板"), 1); that->show(); } void frmM::openFile() { QString newfilename = QFileDialog::getOpenFileName(); if ( !newfilename.isEmpty() ) { showpic( newfilename ) ; repaint(); // show image in widget } } void frmM::saveImage( int item ) { const char* fmt = saveimage->text(item); QString savefilename = QFileDialog::getSaveFileName(QString::null, QString::null, this, filename); if ( !savefilename.isEmpty() ) if ( !image.save( savefilename, fmt ) ) QMessageBox::warning( this, "Save failed", "Error saving file" ); } bool frmM::showpic( const char *fileName ) { filename = fileName; bool ok = FALSE; if ( filename ) { QApplication::setOverrideCursor( waitCursor ); // this might take time ok = image.load(filename, 0); if ( ok ) ok = reconvertImage(); if ( !ok ) {//show failed pm.resize(0,0); // couldn't load image update(); } } return ok; } void frmM::giveHelp() { if (!helpmsg) { QString helptext = tr("<b>名称：</b><i>图片和按键的测试程序</i>" "<p><b>作者:</b> <tt>wisjohn</tt>" "<p><b>版本：</b> <i>Version:1.0.0</i>" "<p>支持的图片格式:" "<blockquote>"); helptext += QImage::inputFormatList().join(", "); helptext += "</blockquote>"; helpmsg = new QMessageBox( tr("关于"), helptext, QMessageBox::Information, QMessageBox::Ok, 0, 0, 0, 0, FALSE ); } helpmsg->show(); helpmsg->raise(); } #if 1 void frmM::paintEvent( QPaintEvent *e ) { #if 0 if ( pm.size() != QSize( 0, 0 ) ) { // is an image loaded? QPainter painter(this); painter.setClipRect(e->rect()); painter.drawPixmap(0, menubar->heightForWidth( width() ), pmScaled); } #endif } #endif bool frmM::reconvertImage() { bool success = FALSE; if ( image.isNull() ) return FALSE; QApplication::setOverrideCursor( waitCursor ); // this might take time if ( pm.convertFromImage(image, conversion_flags) ) { pmScaled = QPixmap(); scale(); resize( width(), height() ); success = TRUE; // load successful } else { pm.resize(0,0); // couldn't load image } QApplication::restoreOverrideCursor(); // restore original cursor return success; // TRUE if loaded OK } void frmM::scale() { int h = 430; if ( image.isNull() ) return; QApplication::setOverrideCursor( waitCursor ); // this might take time QWMatrix m; // transformation matrix m.scale(((double)width())/pm.width(),// define scale factors ((double)h)/pm.height()); pmScaled = pm.xForm( m ); // create scaled pixmap PixmapLabel1->setPixmap(pmScaled); QApplication::restoreOverrideCursor(); // restore original cursor }